Outlook Mobile — decoded design system

outlook.com · light · consumer · deep decode — measured live

Outlook Mobile's design system, decoded live by Mozaika: measured color roles, type scale, buttons with real hover/focus states, motion and the brand's own tokens.

Open in Mozaika →

This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/decode/outlook.com.

Decoded design system

Outlook Mobile's decoded design system: background #FFFFFF, text #000000, accent #0063B7, link #616161, primary #0063B7; type scale h1 50px / h2 37px / body 16px; 4px spacing base; 12px base radius. The single interactive/action color is #0063B7 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #0063B7 — the single interactive color; only on things you click or must notice, never large fills.
• primary, accent, button_bg are all #0063B7 — one role, not several (the action color).
• accent #0063B7 — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
• link #616161 — reads as a neutral UI color, not a link accent — verify against the reference (action = #0063B7).

Typography

• Heading: Segoe UI
• Body: Segoe UI
• h1: 50px
• h2: 37px
• body: 16px

Spacing

• base unit: 4px
• scale: 4px, 5px, 6px, 8px, 10px, 12px, 20px, 24px, 35px, 41px

Radii

• base: 12px
• button: 2px

Motion

Micro-interactions run at 125ms (dominant) with ease-in-out.

• durations: 125ms · 150ms
• easings: ease-in-out · linear
• animated properties: opacity

Native design tokens

…and 110 more measured on the page.

Button states (measured)

• primary focus: outline 3px dotted rgb(0, 0, 0)

Layout (measured)

• container max-width: 1300px
• nav: 54px

Responsive (measured)

• breakpoints: 539px · 768px · 859px · 1083px · 1400px
• mobile (390px): hero 29px · nav hamburger

Install it

Drop this measured system into any shadcn/Tailwind project in one command:

npx shadcn add mozaika.design/r/decode/outlook.com

Or as a Meta Astryx theme — a ready defineTheme file with the measured hover/press states baked in:

curl -o src/themes/outlook.theme.ts https://mozaika.design/api/astryx/decode/outlook.com.ts

registry item · astryx theme · or query it over MCP: get_design_system("Outlook Mobile")

Export: DESIGN.md

# Outlook Mobile — Design System

> light, consumer, high — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#FFFFFF` |
| surface | `#EFEFEF` |
| border | `#D8D8D8` |
| text | `#000000` |
| text_muted | `#606060` |
| primary | `#0063B7` |
| accent | `#0063B7` |
| link | `#616161` |
| button_bg | `#0063B7` |
| button_text | `#000000` |

**Using these colors**

- **Action color** `#0063B7` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `primary`, `accent`, `button_bg` are all `#0063B7` — one role, not several (your action color).
- **accent** `#0063B7` — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
- **link** `#616161` — reads as a neutral UI color, not a link accent — verify against the reference (action = #0063B7).
- **Page coverage** (full-page screenshot pixels): `#E8F0F6` 36.4% · `#C1D2E3` 29.8% · `#FFFFFF` 13.8% · `#DFE0E0` 12.7%

## Typography

- Heading: **Segoe UI** _(free fallback: Newsreader)_
- Body: **Segoe UI** _(free fallback: Newsreader)_

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 50px / 600 · lh 60px · tracking -0.48px |
| h2 | 37px / 600 · lh 44px · tracking -0.48px |
| h3 | 21px / 600 · lh 25px |
| body | 16px / 400 · lh 24px · tracking -0.48px |
| small | 15px / 400 · lh 20px |

- Weight ladder: 400 · 600 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** Segoe UI may be proprietary — safe free fallback: Newsreader (Google Fonts).

## Spacing
- base unit: 4px (inferred from the measured scale)
- measured scale: 4px, 5px, 6px, 8px, 10px, 12px, 20px, 24px, 35px, 41px — snap all gaps/padding to these

## Radius
- base: 12px
- button: 2px
- sharp: 2px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `rgba(0, 0, 0, 0)` / `#000000` | 2px solid rgba(0, 0, 0, 0) | 2px | 10px 12px 10px 12px | 600 16px / -0.48px | none |
| secondary | `rgba(0, 0, 0, 0)` / `#262626` | none | — | 0px 8px 0px 8px | 400 13px | none |

**States (measured, not guessed)**

- primary focus: outline `3px dotted rgb(0, 0, 0)`

## Motion
- durations: 125ms (dominant) · 150ms
- easings: `ease-in-out` (dominant) · `linear`
- animated properties: opacity

Micro-interactions use the dominant duration + easing; nothing on the page animates slower than the longest duration above — don't invent springier motion.

## Their own tokens (verbatim from :root)

| Token | Value |
|-------|-------|
| `--ds-app-color-base-default-fg-heading` | `#0e1726` |
| `--ds-app-color-base-default-fg-body` | `#3a4c56` |
| `--ds-app-color-base-default-fg-highlight` | `#005597` |
| `--ds-app-color-base-default-fg-accent` | `#0078d4` |
| `--ds-app-color-base-default-bg-opt1` | `#f4fafd` |
| `--ds-app-color-base-default-bg-opt2` | `#dceef8` |
| `--ds-app-color-base-default-bg-opt3` | `#fff` |
| `--ds-app-color-base-default-bg-opt4` | `#00ff26` |
| `--ds-app-color-base-default-border-subtle` | `#cbe6f4` |
| `--ds-app-color-base-default-border-strong` | `#002948` |
| `--ds-app-color-base-alt1-fg-heading` | `#0e1726` |
| `--ds-app-color-base-alt1-fg-body` | `#17253d` |

_…and 108 more measured on the page._

Prefer these names when extending their system — it's the brand's actual vocabulary.

## Layout (measured)
- container max 1300px
- nav: 54px · bg #FFFFFF

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 216 | 948 | — | — | 0/0 | — |
| 986 | 178 | — | — | 0/0 | — |
| 1204 | 2587 | — | — | 0/0 | — |
| 3248 | 543 | — | — | 0/0 | — |
| 3791 | 1479 | — | — | 0/0 | — |

## Components (measured)
- link: #0067B8 · underline

## Responsive (measured)
- breakpoints: 539px · 768px · 859px · 1083px · 1400px
- mobile (390px): hero 29px · body 16px · nav: hamburger

## How to apply
Paste the Tailwind `@theme` (or CSS variables) as your base, then build each
section to its spec — verify every color, radius, and font against these tokens.
Hover/focus states, shadows and motion timings above are measured from the live page — match them exactly, don't re-guess them.

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> **Decoded with Mozaika** — measured live, not guessed. Full decoded design system + one-command install: mozaika.design/decode/outlook.com

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An automated reading of Outlook Mobile's publicly-visible CSS (colors, fonts, spacing, motion) — not affiliated with outlook.com. No screenshots stored. Removal requests: hello@mozaika.design.